Carburetor



April21, 1931. 'H OEL'ERlCl-l 1,801,684

l CARBURETOR Fild July 25. 1929 Patented Apr. 21, 1931 UNITED STATES PATENT ol-FIcE HEINRICH OELEBICH, 0F GAUTZSCH, ANEAR LEIPZIG, GERMANY,

RICH HQFMANN, 0F LEIPZIG, GERMANY ASSIGNOR T0 HEIN- caanumroa Application led July 25, 1929, Serial N'o. 380,984, and in Germany December 27, C1928.

bers. In `the last named type `of construetion, ioats and members pertaining thereto .are entirely dispensed with, whereby not unimportant sources of failure and before other things stores of benzene which constitute a great danger of fire are avoided. The iioatless carburetor consequently possesses certain advantages which are a favourable fac'- tor both as regards manufacture owing to the simple construction, and also, later on, in operation. Y

According to the present invention the supply of fuel to the carburetor is regulated by a device such as a rotary valve, plug, disc, or the like positively connected with the throttle valve, the quantities of fuel required for the `production of a homogeneous gas mixture being supplied Vpositively in accurately determined quantities to air amounts regulated by the throttle valve. -It is immaterial whether the internal combustion engine works at high, medium or low n -umber of revolutions. The passages provlded in the control device are so constructed that according to their position they supplya determined quantity of fuel to the carburetor.

Sucha carburetor has, in addition to its simple and reliable construction the great advantage that the fuel supply is less in com- `parison with the known constructions, and that owing to the above described fixation of the quantities supplied, a homogeneous mixture is produced which has a high ex plosive force, and-consequently increases 'the elliciency of the power engine.

The accompanying drawings show by way of example' one construction embodying the `features of the invention.

Fig. 1 is a sectional elevation showing the improved fuel supply regulating device directly combined with the throttle valve.

Fig. 2 is a cross section through the -fuel l supply regulating valve.

' casing.

Fig. 4 is another cross section through the fuel supply regulating valve, and

Fig. 5 is a sectional elevation showing the fuel supply regulating valve and the fuel inlet valve.

In the valve body 1 is arranged a fuel inlet valve comprising a piston valve 2 working in a valve chamber 19 closed by means of a screw lcap 18. The valve is moved in the downward direction by a spring 17 and is moved upwards by the suction created in the suction pipe 15 leading to the engine. The suction pipe 15 communicates with the chamf ber 19 through a passage 16. The valve 2 is guided in the casing 1 by means of a stem portion 3 which is formed at its lower end so as to constitute a conical valve .12 resting upon a seat 13 and controlling a fuel admission passage 4 which communicates through a union 14 with the fuel supply vessel (not shown in the drawings).

When the valve 12 is raised the fuel supply passage 4 communicateswith the passage 5 which communicates with a further passage 9, the end of which is formed in a rod 10 by 'means of which the usual air guide 35 is which regulates. the amount of fuel passing from the passage 5 into the passage 9 may be constructed in any desired manner and consists in the construction shown of a rotary plug valve 7, having a transverse passage 24, 25 co-operating with the passage 9 and a transverse passage 23 co-operating with the passage 5, the passages 23 and 24 being connected by a passage 6, The valve 7 is loaded by a spring 20 and is directly connected with the throttle valve 8, the latter being lixedly mounted upon a valve spindle 29 adapted to be operated from' the outside by means of' a lever 30. It may be seen from Figs. 2, 3 and 4 that the plug body is provided with peripheral grooves 27 and 28` extending'from the ports of the passages 24 and 23. Thesef grooves extend over one quarter'ofs'the pe.- riphery of the plug and have a depth diminishing towards. the ends' of the grooves, so

that when the plug is turned from the position shown in the drawing in Figs. 1, 2 and 4 in the anti-clockwise direction, the cross sectional area of the passage through which the Huid has to pass between the passages 5 and 9 is gradually reduced. On turning the valve plug 7 through 90 the throttle valve 8 is at the same moment turned from the fully open position shown in Fig. 1 to the fully closed 10 position, so that the amount of fuel issuing at 31 will always correspond exactly with 'the amount of air drawn through the suction tube in the direction of the arrows 33 and 34. Itwill be understood that at the first suction stroke of the engine, the valve 2 is raised by the suction produced in the passage 16, whereupon the fuel will flow -from the passage 4 to the passage 5 through the plug 7- and passage 9 and will issue at 31 as shown.

I claim:

1. In a carburetor for internal combustion engines the combination of: a casing provided with an air passage; 'a fuel atomizer in the said air passage; a throttle valve behind said fuel atomizer in the air passage;

an axle on which said throttle valve is mounted; a regulating valve in said casing for the supply of fuel to said atomizer, the regulating valve being arranged on the axle of said y 3 0 throttle valve and a spring pressing said .regulating valve on to its seating.

2. In acarburetor for internal combustion engines the combination of: a casing provided with an air passage; a fuel atomizer in the said air passage; athrottle valve behind said fuel atomizer in the air passage; an axle on which said throttle valve is mounted; a re ulating valve in said casing for the supp y of fuel to said atomizer, said regulatlng valve being arranged on' the axle of the said throttle valve; a spring pressing said regulating valve on to its seating; and a fuel inlet valve within the casingadapted to be operated by the suction produced in the said 'a1r passage any leakage of fuel being prevented by the said casing enclosing all regulating nieans.

Signed at Leipzig, Germany, this 10th day of July, 1929.,

HEINRICH OELERICH. 

